Pneumatic tire including sipes
AssigneeBridgestone Corporation
InventorArata Tomita
Life of this patent
Estimating the term…
Abstract
A pneumatic tire in which a sipe, which is substantially parallel to a contour line of a trailing edge of a ground-contact configuration, is formed in a trailing edge region of each block at shoulder sides of the pneumatic tire. From a time of step-in to a time of kick-out of a block, the effect of shearing strain which is transmitted to a trailing edge from a preceding trailing edge portion is mitigated, and movement of the trailing edge of the block with respect to a road surface is suppressed. Accordingly, wear at the trailing edge of the block, i.e., heel-and-toe wear, is suppressed, and noise caused by heel-and-toe wear is reduced.
Claims6
A pneumatic tire having a tread pattern including a plurality of blocks defined by a plurality of circumferential direction grooves extending substantially along a tire circumferential direction and a plurality of transverse direction grooves extending substantially along a tire transverse direction, wherein a sipe formed in a region at a trailing edge of each of blocks at shoulder sides of said pneumatic tire among the plurality of blocks, wherein both said sipe and a contour line at a trailing edge of a ground-contact configuration are inclined opposite a tire primary rotation direction as the sipe extends toward the axial direction outer-side of the tire, said sipe and said contour line are substantially parallel to each other at a same axial distance from an equatorial plane of the tire, a second sipe formed in a region at a leading edge of each of blocks at shoulder sides of said pneumatic tire among the plurality of blocks, both said second sipe and a contour line at a leading edge of a ground-contact configuration being inclined toward said tire primary rotation direction as the sipe extends toward the axial direction outer-side of the tire, and being substantially parallel to each other at a same axial distance from an equatorial plane of the tire.
A pneumatic tire having a tread pattern including a plurality of blocks defined by a plurality of circumferential direction grooves extending substantially along a tire circumferential direction and a plurality of transverse direction grooves extending substantially along a tire transverse direction, wherein a sipe, which is inclined opposite a tire primary rotating direction as the sipe extends toward the axial direction outer-side of the tire, is formed in a trailing edge region of selected blocks of the plurality of blocks, and wherein said sipe is substantially parallel to a tangent line that is tangent to a contour line at a trailing edge at a ground-contact configuration at a same axial distance from an equitorial plane of the tire, a second sipe, which is inclined toward said tire primary direction as it extends toward the axial direction outer-side of the tire, is formed in a leading edge region of each of the selected blocks of the plurality of blocks, wherein said sipe being substantially parallel to a tangent line which is tangent to a contour line at a leading edge of a ground-contact configuration.
A pneumatic tire having a tread pattern including a plurality of blocks defined by a plurality of circumferential direction grooves extending substantially along a tire circumferential direction and a plurality of transverse direction grooves extending substantially along a tire transverse direction, wherein
- a first sipe, which is inclined with respect to a tire rotational axis such that a tire transverse direction inner side of said first sipe is disposed further toward a tire primary rotating direction side than a tire transverse direction outer side of said first sipe and which is substantially parallel to a contour line at a trailing edge of a ground-contact configuration at an axial location of said tire, is formed in a trailing edge region of each of selected blocks of the plurality of blocks;
- and
- a second sipe, which is inclined with respect to the tire rotational axis such that a tire transverse direction inner side of said second sipe is disposed further toward a side opposite said tire primary rotating direction than a tire transverse direction outer side of said second sipe and which is substantially parallel to a contour line at a leading edge of the ground-contact configuration at said axial location of said tire, is formed in a leading edge region of each of the selected blocks of the plurality of blocks.
A pneumatic tire having a tread pattern including a plurality of blocks defined by a plurality of circumferential direction grooves extending substantially along a tire circumferential direction and a plurality of transverse direction grooves extending substantially along a tire transverse direction, wherein
- a first sipe, which is inclined opposite the tire primary rotating direction as the sipe extends toward the axial direction outer-side of the tire, is formed in a trailing edge region of each of selected blocks of the plurality of blocks at an axial location of said tire;
- and
- a second sipe, which is separated from said first sipe and is inclined toward the tire primary direction as the second sipe extends toward the axial direction outer-side of the tire, is formed in a leading edge region of each of selected blocks of the plurality of blocks at said axial location of said tire, wherein said second sipe is substantially parallel to a contour line at a leading edge of a ground-contact configuration at a same distance from an equatorial plane of the tire.
Dependencies are inferred from the claim text.